
Road Traffic Noise Reducing Devices - Procedures For Assessing Long Term Performance - Part 1: Acoustical Characteristics
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Road Traffic Noise Reducing Devices - Procedures For Assessing Long Term Performance - Part 1: Acoustical Characteristics
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频